When given a choice, I connect wireless, to car, to Apple TV, to speakers, I use the ear buds or head phone so rarely I can easily see the direction Apple is going.
Sure some people will gripe, but if Apple says the sun rises in east, some people would gripe and take issue. Since technically sun does not rise, earth rotates exposing the sun.
Apple has stated many times they don't use focus groups or even ask what consumers want in their phones. If they operated this way, the original iPhone would never have been made. Everyone wanted a hard keypad until Apple decided on it's own the customer was largely wrong.
Polls, hand wringing, predictions of doom and reduced sales, all irrelevant to what Apple will or won't do.
Dangling wires days are coming to a close. The Apple Watch never came with a dangling wire between phone and watch. Soon wire between phone and earbuds/earphones will diminish to point of oddity.
For some, a very few, this will be catastrophic. For vast majority it will be an adjustment. It will be a choice between continuing with iPhone for variety of reasons, style, iOS, connectivity, whatever or going with an alternative till that alternative also moves in same direction of eliminating the cords. And they will if history shows anything at all.
At this point all is speculation, probably best to see what Apple offers, and an explanation of why they are moving in a particular direction. One thing for sure, our personal communications devices sure garner a passion akin to some that religion previously held. I'm not sure the isolation from fellow humans we are displaying is better for society. Observing people I note that we are far more engaged with our phones than other people standing next to us. Have witnessed girls texting each other that are sitting right beside each other, truelly remarkable.